{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["cell line", "protein", "DNA", "cell type", "RNA"], "input": "By virtue of the presence of CD4 on the cell surface , PLB-985 cells were chronically infected with HIV-1 strain IIIB ."}
{"cell line": ["PLB-985 cells"], "protein": ["CD4"], "DNA": [], "cell type": [], "RNA": []}